PCA9535CPW,112

I/o Expanders Overview

The PCA9535CPW,112 is a 24-pin CMOS device providing 16-bit General Purpose parallel Input/Output expansion for I2C-bus/SMBus applications. It operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. The component features an active LOW interrupt output and includes polarity inversion registers. All I/O pins default to inputs at reset. The device offers ESD protection exceeding 2000 V HBM and latch-up testing per JEDEC JESD78 standards.

I/o Expanders Feature Summary

• Open-drain outputs on all I/O pins
• Active LOW interrupt output capability
• Polarity inversion register support

I/o Expanders Applications

• ACPI power switches
• Sensors
• Push buttons
• LEDs
• Fans

I/o Expanders Procurement Notes

Verify the specific ordering suffix '112' against the manufacturer's current documentation to confirm the packing method and marking details. Ensure the TSSOP24 package dimensions align with the target PCB footprint requirements before finalizing procurement orders.

I/o Expanders Selection Notes

Select this variant when open-drain I/O configurations are required, as it differs from the standard PCA9535 which uses totem-pole outputs. Confirm that the 2.3 V minimum operating voltage meets the system's low-power design constraints and that the TSSOP24 package fits the available board space.

I/o Expanders Part Context

This component belongs to the PCA9535 series of I/O expanders designed to enhance NXP Semiconductors' family of I2C-bus devices. It shares pin-to-pin and address compatibility with the PCF8575 but requires software changes due to architectural enhancements such as individual I/O configuration and lower supply current consumption.

I/o Expanders Replacement Considerations

The PCA9535CPW,118 serves as a direct replacement offering identical electrical characteristics in the same TSSOP24 package, differing only in the reel-based packing method rather than functional performance.